Furnace-grate



(o Model.)

F. SHRIVBR.

`FURNACE GRATE.

Patented S ATTORNEYS.

y UNITED STATESI APATENT trice.

'IrnnDnmoKl snaivnaor GRAN-D RAPIDS, MICHIGAN.

FunnAcla-GRATE.

SPECIFICATION forming part of`Letters Patent N0. 265,158, datedSeptember 26, 1882.

Application filed May 9, 1882. L(No model.)

and useful Improvements inl Fu'rnace-(rrates,= of which the following isa full, clear, and ex-` 'act description.

The invention consists of an improvement.-

in the form of the grate-bar, calculated to enable the bar to resist thetendency ot' the heat to spring and bend it more eftectually.

It also consists of improvements in the construction ot' the pointsor-projections ofthe sides of the bars, designed to facilitate thedischarge of the ashes and other matters by the rocking of the gratesand without the use of the poker.

oting the grate-bars, calculated to simplify and improve the efficiencyof the same; and it also consists ot' improvements in the apparatus forshaking the bars to discharge the ashes, all as hereinafter fullydescribed.

Reference is to be had to the accompanying drawings, formin g a part ofthis speciication, in which similar letters of reference indicatecorresponding parts in all the iigures.

Figure 1 is a plan view ot' myimproved furnace-grate as constructed andarranged for heavy lires. Fig. 2 is a plan ot' the same as arranged forlight tires. Fig. 3 is a section of Fig. l on line x x; Fig. 4 is a sideelevation of Figs. l and 3, looking in the direction of the arrows. Fig.5 represents end elevations of the grate-bars. Fig. 6 is a horizontalsection of one ot' the bars, and Figs. 7 and S are sections of the barsas represented in Fig. 2.A

I make the bars A in concavo-convexlform in cross-section from bottom totop, with'pro- 4o jections a on the convex side b, that are hollowed orchambered by the cavities d on the concave sides e ot the bars, and onthe opposite or concave sides e of said Vbars I make the fingers j'longer than the projections a, the projections ot' one side of the barsbeing opposite to the spaces between the fingers of the other side. Bythe concavo-convex form of the bars, together with the alternatingarrangement of the projections and fingers and the corrngations ofcavities d, it is believed that the bars will have great power ofresistance to the tendency ot' the heat to spring or Athe bars of thenext pair. slotted pivot-bearin gs j, to be mounted on fixed l bendthem. 'lhe ends of' the bars are made with laterally-projectingpivot-heads g and li turned to the side having the ngers f--thatA is,the concave side ot' the barthe head g of one bar and the head h oftheother bar being matched, so as to go on one and the same pivot, t',to locate the bars in pairs, with the fingers f ot' the two barsintermeshing with each-other, and so that the projections a of the barsof one pair will mesh with the projections a ot' The heads g l1, havepivot-studs t' projecting from bars k, attached to the furnace-walls, orfrom metal walls of the furnace when such are used; or it may be rods orbars inserted in' and projecting from the sides of the walls. or frombetween two lt also consists of animproved mode of piv-` metal plates,whereby the bars may be made adjustable, so that they can be easilyadjusted to round or square tires. ings j are slotted through the headsdownward, so that the bars can be placed on the pivots from above, andwill rest thereon without being fastened, and so that they can bereadily taken oft' and reapplied when desired. The ba'rs have an arm, l,cast on the concave side, and projecting down and connecting bypivots mwith a shaking-bar, n, the said arms l being located about the middleofthe bars lengthwise, so that by arranging the shaking-bar to havesuitable supports to rest on when in the normal position the grate-barswill have substantial support between their pivots. The arms Z are, likethe pivot-heads, arranged so that the two arms ot' a pair ot' bars lapeach other on opposite sides of bar n, to be connected by one pivot, m,when the bars are arranged in pairs upon one pivot, i, and the arms lwill have a slot, o, for the pivot m, so that, although the two bars ofa pair mainly turn together as one bar, the intermeshing fingers f ot'the pair will work a little on each other, so as to facilitate thedischarge of the ashes. Besides connecting the two arms Z of a pair ot'bars together at the connection with the bar n, I also connect themtogether by a pin at p, for staying the bars by each other againstspringing by the heat. When the bars are constructed for light res, byextending the fingers f the heads g h and arms Z will not be required tolap each -The said pivot-bear- Y IOO other, as when arranged in pairs,and only halt' the number of bars will be used, or thereabout,

- the said bars being more widely separated according as the iin gersare extended and placed on independent pivots for each bar. The bars arealso independently connected to the shaking-bar n, so thatthe lingersfof the respect.

ive bars will work reversely to each other. The shaking-bar a is to bedetachably connected to the arms Z by bolts or otherwise, so that thegrate-bars can be detached readily when desired.

It is designed that in practice the fingers f shall project slightlyupward from the bars when arranged in position in the grate.

The grate-bars will he arranged crosswisey ofthe ire, so that thcshaking-bar will project out through the wall of the ash-pit to beoperated by a connected lever.

Having thus described my invention, I claim as new and desire to secureby Letters Patentl. The improved dre-grate bar, made concavo-convex invertical transverse section, and

provided with slotted pivot heads, substantially.as described.

2. The improved tire-grate bar, made concavo-convex in verticaltransverse section, and having projections a on the convex side ofthebar, hollowed by cavities d on the opposite and tin gers, and also having slotted pivotheads` g h, arranged to overlap for the connection of thebars to the pivots in pairs, substantially as described.

5. The improved firegrate bar, madein con cavo-convex transversesection, and having the sides armed with alternating projections andfingers, also, having slotted pivot-heads, and also having armsconnecting with the shaking-bar, substantially as described.

6. The improved tire-grate bar, made in concavo-convex transversesection, and having the sides armed with alternating projections andlingers, and also having arms connecting them with the shaking-bar, saidarms being arranged whereby the arms of a pair ot' said bars connectwith the shakin g-bar by one and the same pivot, m, substantially asdescribed.

7. rlhe improved tire-grate bar, made in concavo-convex transversesection, and having the sides armed with alternating projections andfingers, also having overlapping pivot-heads", and also having armsconnecting them with the shaking-bar, said bars being arranged in pairs,and the arms ot' the pairs being` con-- stantially as described.

FREDERICK SHRIVER. Witnesses:

FRED S. CLARK, LINCOLN BOWEN.

